From the sounds of it, you have done all the tests and steps I would have done, and that would have been suggested by the MAP team.

The fact that WBEMTest is failing even after you’ve done all these steps, and eliminated the possibility of 3<sup>rd</sup> party firewalls (which doing internet searches on this issue seems to be a major cause), and your still having this issue I think that your only solution might be bringing this directly to the windows people.